318664660 has 48 divisors (see below), whose sum is σ = 711683280. Its totient is φ = 119439360.

The previous prime is 318664657. The next prime is 318664667. The reversal of 318664660 is 66466813.

It can be written as a sum of positive squares in 8 ways, for example, as 32581264 + 286083396 = 5708^2 + 16914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318664667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79996 + ... + 83884.

It is an arithmetic number, because the mean of its divisors is an integer number (14826735).

Almost surely, 2^318664660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318664660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355841640).

318664660 is an abundant number, since it is smaller than the sum of its proper divisors (393018620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318664660 is a wasteful number, since it uses less digits than its factorization.

318664660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156 (or 4154 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 318664660 is about 17851.1809133178. The cubic root of 318664660 is about 683.0376358268.

The spelling of 318664660 in words is "three hundred eighteen million, six hundred sixty-four thousand, six hundred sixty".